I just looked back at that thread: yes, I misspoke; "2. Lvl 1-4 Treasure Maps do NOT give Invisibility jewelry, period" is particularly incorrect; specifically, I had
rings 'on the brain', and I should have said that, and didn't. 100% my bad.
Earlier, that post, I had qualified, "... and I simply don't remember if I've ever retrieved Invisibility items from any MiB/SOS." Strictly speaking, that's true, but might convey the wrong idea: I
do know that I've pulled rings, but also Magic Reflection jewelry/clothes, from an SoS; I merely could not truthfully say, "I've pulled Invisibility gear from an SoS".
Otherwise, no, I did not say "Level 4-5 treasure chests usually don't contain ..."
Anyhoo, take a gander at "
Dungeon Chest Loot", from 2013, which includes discussion of what is found and what is not found, in order to gain some insight into other players' experiences.
"
dungeon loot chest question" offers more/other information, but the substance of that thread commutes with the first one I've linked.
This Stratics page has some interesting info, but it's from 2004 and, so, might contain (some) misleading information.
When I said that most of the jewelry/clothes charges are junk (particularly from any dungeon chest and, I guess, according to one's definition of, "junk"), I had only intended to caution readers to not inflate their expectations, and that is all.
SS